Nagy, J., Harsányi, G., Jánosy, O., Harsányi, E. and Nagy, O. (2014) “The effects of education, culture, research and development in Hajdú-Bihar county”, Acta Agraria Debreceniensis, 0(61), pp. 87-90. doi: 10.34101/actaagrar/61/2048.